First Solar (FSLR), the biggest maker of thin-film solar power systems, bought Solar Chile, expanding its presence in the growing South American market. The deal continues a consolidation trend in the rebounding solar industry. Shares of solar companies popped following the purchase of two SunPower (SPWR) solar projects last week for up to $2.5 billion by a company controlled by Warren Buffett's Berkshire Hathaway (BRKA). Financial terms of First